These are the first appearances of famous movie stars. Many people forget that many of these actors started in show business long ago. These actors have certainly changed since their first days in show business.
Johnny Depp
1st appearance: “A Nightmare on Elm Street” (movie), 1984
Tom Hanks
1st appearance: “He Knows You’re Alone” (movie), 1980
Tom Cruise
1st appearance: “Risky Business” (movie), 1983
Robin Williams
1st appearance: “Happy Days” (TV series), 1978
Jim Carrey
1st appearance: “Earth Girls Are Easy” (movie), 1989
Will Smith
1st appearance: “The Fresh Prince of Bel-Air” (TV series), 1990
Leonardo DiCaprio
1st appearance: “Parenthood” (TV series), 1990
Sylvester Stallone
1st appearance:The Party at Kitty and Stud’s (soft pr0n), 1970
Brad Pitt
1st appearance: “Dallas” (TV series), 1987
Antonio Banderas
1st appearance: “Labyrinth of Passion” (movie), 1982
Denzel Washington
1st appearance: “Carbon Copy” (movie), 1981
Orlando Bloom
1st appearance: “Wilde” (movie), 1997
Jackie Chan
1st appearance: “Hand of Death” (movie),1976
Sean Connery
1st appearance: “Another Time, Another Place”, (movie), 1958
Clint Eastwood
1st appearance: “Revenge of the Creature” (movie), 1953
Harrison Ford
1st appearance: “Dead Heat on a Merry-Go-Round” (movie), 1966
Matt Damon
1st appearance: “Mystic Pizza” (movie), 1988
Jim Carrey - I know he was in Peggy Sue Got Married and The Dead Pool (a Dirty Harry movie)before Earth Girls.
Leonardo Dicaprio - was in the TV series Growing Pains as Luke Bower.
Denzel Washington - was in a couple of TV movies before Carbon Copy.
I could go on, but then all I would be doing is making a better list.